As the saying goes, “ten days after autumn is hot”, the temperature remains the same, but it is obvious that the humidity is no longer, the sky is dry and dry, while the UV rays are still blinding, the sudden high temperature of UV rays to our skin and hit a stick, sun protection, moisturizing homework still can not slacken, the following provides the reader with photosensitive substances for reference. The following is a reference for readers with photosensitive substances. Patients with photosensitive dermatitis should avoid eating or touching during the day. The actual fact is that you can find a lot of people who are not able to get a good deal on a lot of things. The intensity of the reaction is related to the intensity of light, duration of exposure, individual skin color, body type, race, etc. It is more common in late spring and early summer, and is more common in children, women, skiers and water workers. It is generally not difficult to diagnose based on localized skin erythema, edema or blistering after sun exposure, leaving pigmented spots after healing, and self-conscious burning and painful sensation. In mild cases, local topical application of skin cream, slightly heavy line of cold compresses, glucocorticoid cream. 1, often participate in outdoor exercise, so that the skin melanin production, in order to enhance the degree of skin tolerance to sunlight: but patients with strong sensitivity to sunlight, should try to avoid sun exposure. When you go out to do a good job of protection such as playing umbrella, wearing a straw hat, gloves, etc.. You can also use some topical light-avoidance agents: such as reflective shading agents, 15% zinc oxide ointment; 5% titanium dioxide emulsion; 5% para-aminobenzoic acid emulsion or tincture; 10% Salo (salo) ointment, etc.. It can be applied on the exposed skin 15 minutes before sun exposure. During the summer months of June to August, 10-14 o’clock is the most intense time of daylight in the ultraviolet radiation, medium-wave ultraviolet B is the culprit of solar dermatitis, should try to avoid going out at this time. When you must go out, you should wear long sleeves and long pants (to light colors is better), wear a straw hat or play umbrella, the effect is quite good. 2, strengthen skin nutrition, usually eat more fresh fruits and vegetables: moderate amount of fat to ensure adequate skin elasticity, enhance the skin’s anti-wrinkle vitality, vitamin C and B12 can stop and weaken sensitivity to ultraviolet light, and promote the fading of melanin, and can restore the elasticity of the skin, so the summer should eat more food rich in multivitamins. 3, you can use drugs to prevent and control: can take oral niacinamide, beta-carotene, B vitamins, etc.. When the dermatitis attack, oral hydroxychloroquine, reaction stop (pregnant women should not be used), etc.. The treatment of local skin lesions, chronic solar dermatitis can be moderate amount of external use of skin cream, due to the delicate facial skin, option with oral or external drugs, must be under the guidance of a doctor. The actual skin massage can promote the metabolic function of the skin tissues: it can enhance the skin’s resistance to melanin deposition and make the skin full of youthful vitality. The patient with solar dermatitis generally shows a regular annual onset, especially in the spring and summer after exposure to the sun, the symptoms began to flare up, if not treated in a timely manner serious harm, patients should bear in mind. In daily life you are advised to consume less greasy, sweet and stimulating foods, tobacco, alcohol, etc. Eat more vitamin-rich food can enhance the body’s immune system. Eat more fruits and vegetables. Also drink more water. More vitamins, carrots contain more vitamin C, you can eat more. Common photosensitive foods are ashwagandha, capers, celery, purple clover, snow lettuce, fennel, amaranth, radish leaves, spinach, buckwheat, safflower, rape, mustard, snail, shrimp, crab, mussels, figs, citrus, lemon, mango, pineapple, cilantro, etc. Generally speaking, light-sensitive vegetables are aromatic vegetables, and vegetables with a more pronounced odor are likely to be light-sensitive vegetables. Photosensitive substances include skin daily contact such as beauty cosmetics, cleaning agents in the fragrance, preservatives, aniline and aniline derivatives, dyes, etc.; occupational environment contact or external use for the skin such as tar, asphalt and some moss-like plants, bone marrow, dahurica, coumarins, etc.